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Top 13 TypeScript Datetime Projects
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AppSignal
AppSignal knows why the f*#k it crashed. Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.
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timeago.js
:clock8: :hourglass: timeago.js is a tiny(2.0 kb) library used to format date with `*** time ago` statement.
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tempo
๐ Parse, format, manipulate, and internationalize dates and times in JavaScript and TypeScript. (by formkit)
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qrono
๐ฅ A tiny JavaScript date library with 100+ APIs and strict DST guarantees. Designed for single-timezone applications. (by urin)
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Kargo
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bsday.js
Modern TypeScript/JavaScript SDK for Bikram Sambat (BS) โ Gregorian (AD), with date manipulation, Nepali fiscal years, localization, calendars, and Panchang data.
Project mention: Meet bsday.js โ The Ultra-Fast, Zero-Dependency Bikram Sambat (BS) Calendar Engine for JavaScript & TypeScript ๐ณ๐ต | dev.to | 2026-08-29 -
kairos-lang
Kairos โ a schedule definition language: a composable time-stream DSL with first-class calendars, business days, windows & projections. ใๆๆซ3ๅถๆฅญๆฅๅใใๅผใงๆธใใในใฑใธใฅใผใซๅฎ็พฉ่จ่ช
Project mention: Kairos 1.0 โ a schedule language where "3 business days before month-end" is an expression | dev.to | 2026-09-13Today I tagged 1.0 of Kairos, a schedule definition language I've been building โ a small DSL where schedules like "3 business days before month-end" or "payday on the 25th, previous business day if it's a holiday" are single expressions.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
TypeScript Datetime discussion
TypeScript Datetime related posts
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Kairos 1.0 โ a schedule language where "3 business days before month-end" is an expression
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Migrating from crontab: five everyday schedules, translated into Kairos
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Show HN: A Simple Server to Match Long/Lat to a TimeZone
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Issue with Date Range Selection and Independent Year selection for Two Calendars in svelte js
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Flash News App React Native (Expo^)
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Guys, have you noticed that Safari's date-picker is giving us a real headache? I mean, it's responsible for a whopping 33% of our customer support problems! Can we do something about this, or are we just gonna keep dealing with angry customers who can't figure out how to select a date on Safari?
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Which form package compatible with Vue 3 has the best developer experience?
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A note from our sponsor - Kargo
akuity.io | 15 Sep 2026
Index
What are some of the best open-source Datetime projects in TypeScript? This list will help you:
| # | Project | Stars |
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| 1 | flatpickr | 16,467 |
| 2 | timeago.js | 5,368 |
| 3 | tempo | 2,587 |
| 4 | react-datetime-picker | 583 |
| 5 | node-geo-tz | 452 |
| 6 | shadcn-date-time-picker | 305 |
| 7 | qrono | 127 |
| 8 | ptera | 76 |
| 9 | browser-geo-tz | 37 |
| 10 | react-native-datefield | 10 |
| 11 | date-time-custom-element | 4 |
| 12 | bsday.js | 1 |
| 13 | kairos-lang | 0 |
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